Improvement in rock-drills



11. & J. SHOEMAKER.

' DRILL.

110'. 111265. Patented Jan. 24- 1871.

AV fizz/671K3 7 w/ 1 M" dtnitrd gluten patent earn.

HENRY snonMAKEnfA DJoHN SHOEMAKER, or PUTNEYV-ILLE,

' PENNSYLVANIA.

Letters Patent No. 111,265, dated January 24, 1871.

IMPROVEMENT m ROCK-DRILLS.

To all whoni it army concern:

Be it known that we,-HnNnY SHOEMAKER and J OHN SHOEMAKER, oflutneyvil'le, in the county of Armstrong and State of Pennsylvania, haveinvented anew and useful-Drill for Drilling Goal, Slate, and Sand-Rock,and other minerals; and we do hereby declare that the following is afull, clear, and exact description thereof, sufficient to enable thoseskilled in the art to which our invention appertains to make and use thesame, reference being had to the accompan ying drawing making part ofthis specification, and to the letters and figures marked thereon. Ourinvention relates to means for holding and operating drills, andconsists in a novel construction and combination of devices intended toserve as an e-fi'ective apparatus for securing a drill in position,.andrendering it easily removable and attachable.

In the drawing- Figure 1 is a longitudinal elevation, showing a drillinserted in thetube, but not locked.

Figure 2 shows the position of. the parts when the drill is locked. v

Figure 3 is a longitudinal view, partly in section.-

Figure 4 is a transverse section, taken in the line a; x of fig. 1.

Figure 5 is alongitudinal view, partly in section, showinga drillinserted but not locked. I

Figure 6 is a longitudinal view, partly in section, showing the drilllocked.

Figure 7 is a transverse. section, showing the position of the lower.hand or sleeve when the drill is locked.

Figure 8 is a transverse section, taken in the line 3 y of Figure 9 is aside view, and

Figure 10 an edge view of one of the drills.

The tube A is made of any suitable metal and of any desired lengthand-diameter, and has formed on one end a male-screw threadcorresponding with fe male-screw threads formed on two bands or sleeves,

B and (l. The outside of the sleeves B and 0 may either be milled ormade polygonal in form, so as to be turned by a wrench.

On the outside of the tube A, diametrically opposite to each other, aregrooves,- q', extending the entire length of the space occupied by thescrew-thread; and immediately adjoining the grooves aare notches orslits, a' extending about .one-hali'thc length of the space occupied'bythe screw-t ln'ead.

On the inside of the band 'or sleeve C, opposite each other, are grooves0, corresponding in width with the notches or slitsn.

' -The width of the notches or slits a, and of the grooves 0, correspondwith the-thickness of the drills. The band or sleeve B may be of anydesired width; but we find that, if made about one-third the width ofthe band C, it will accomplish the purpose for which it is intended.

Sliding in the grooves a are keys K, formed with two shoulders, k 7.,just far enough apart to allow the sleeve B to wo 'k easily betweenthem.

The drill D is formed with two shoulders, (l d, on each side, far enoughapart to allow the sleeve 0 to work between them.-

On the inside of the tube. A, near the termination of the slitsta ashoulder is formed by making the bore of the tube larger above thatpoint than below it. This shoulder forms a valve-seat for a valveopening upward. I

Any suitable form of valve may be used, but the form we prefer, as beingthe most simple and economical, consists of a plain metallic disk,F,-which rests upon the shoulders-inside of the tube, "and is prevent edfrom rising too far .by pins 7, placed diametrically across the tube.

In adjusting the parts for use the band B is screwed on the tube A untilit nearly reaches the termini of the. slits a'.. i

The keys K are then placed in the slits 0 until the shoulders I; engagewith the band B, and then turned so as to slide in the grooves a, andthe band B is screwed on to near the terminus of the screwthread.

The sleeve 0 is then screwed on until it nearly reaches the termini ofthe slits a and the grooves c, placed so to form a continuation of thelines forming the sides of the slits a. Y

The drill is then inserted in the slits a, and the sl'eeve 0 turned soas to bring the grooves c in a line with the grooves (I, the sleeve 0passing between the shoulders (Z (I. a r

The sleeve B is then unscrewed, forcing the keys K into the spacesbounded by the grooves a and grooves o, lockingthe drill and holdingtheparts securely.

By the reverse motion of that just described the drills may be takenout, which will often be found convenient'ior the purpose of sharpeningor to replace them with other drill-s of different forms.

in, using this drill, at every blow the valve F is i opened, and thesand and drillings are forced upward or outward, and are prevented fromreceding by the valve falling again to its seat upon the shoulder in thetube, so that it is not necessary to withdraw the drill to remove thesand and drillings until the tube becomes filled.

This drill may be used to advantage -in drilling oilwells, by attachingthe drill to the sinker-bar'in the ordinary manner.

What we claim' as new; and desire to secure by Letters Patent, is-

The combination of the tube A, sleeves B and C,

grooves a (0, slots a a, and keys K K, substantially as and for thepurposes specified.

' Witnesses:

JAMES W. QUOWN, A. Yosr.

